Question

In: Finance

Part I – Original Mortgage: When Jane and Patrick Baker were “house hunting” five years ago,...

Part I – Original Mortgage:
When Jane and Patrick Baker were “house hunting” five years ago, the fixed rate on a 30- year mortgage was 4.90% APR (monthly compounding) while the 15-year fixed rate was at 3.25% APR (monthly compounding). After walking through many homes, they finally reached a consensus and decided to buy a $500,000 home.


The couple decided to put a 20% down payment in cash and take a loan for the remainder of the house price.   They chose the 30-year mortgage, despite the higher interest rate.

Part II – Refinance the Mortgage (pay off the old mortgage and open a new mortgage at a new rate):

         Currently, mortgage rates have come down and the refinancing frenzy in underway. Jane and Patrick have seen Bank of America advertise the 15-year fixed rates at 2.70% and 30-year fixed rates at 3.75%. The couple decided to refinance their loan over 15- years at 2.70%.

Follow the instructions below and answer all questions using formulas in excel.

  1. Use the template provided below to generate cashflows and answer the below questions. In generating the cashflow scheduled you can mimic the example in your notes and book which outlines an amortizing loan.
  2. What is Jane and Patrick’s monthly mortgage payment for the original 30-year mortgage
    (prior to the refinancing)? Use the =PMT() function in excel for this calculation, check your answer with calculating the Annuity Payment (see notes).
  1. Construct a cash-flow amortization schedule in excel for the first five years of the loan using formulas. Ensure you use formulas to construct this schedule rather than typing in values. Leave all formulas in the cells for review.

  1. During the first 5 years, how much in total cash has the couple paid towards the mortgage?
    What percentage of the cash was applied toward interest?
    What is the balance on their loan as of the end of the 5th year?
  1. Had the couple originally taken a 15-year mortgage rather than a 30-year mortgage, how much higher would their monthly payment be?
    What would be the balance on their loan be at the end of year 5 if they had opted for the 15-year mortgage?
  1. What is Jane and Patrick’s monthly mortgage payment after refinancing their mortgage 5-years after they bought the house?

Solutions

Expert Solution

Part I

Original Mortgage

30 year rate 4.90%
15 year rate 3.25%
Home value $500,000
Downpayment 20%
Downpayment value ($500,000*20%) $100,000
Mortgage Loan taken ($500,000-$100,000) $400,000

1. Jane and Patrick’s monthly mortgage payment for the original 30-year mortgage:

Tenure (in years) 30
Payments per year 12
Loan Amount $400,000
Interest rate (per annum) 4.90%
Monthly mortgage payment = PMT(Interest rate/12,Tenure*Payments per year,-Loan Amount) = PMT(4.90%/12,30*12,-$400,000) $2,123

2.  Construct a cash-flow amortization schedule in excel for the first five years of the loan using formulas:

Year Month Opening Principal (A) Monthly Mortgage Payment (B) Interest (Opening Principal * (4.9%/12) (C) Principal (D) = (B) - (C) Closing Principal (E) = (A)- (D)
1 1    400,000               2,123                    1,633            490    399,510
1 2    399,510               2,123                    1,631            492    399,019
1 3    399,019               2,123                    1,629            494    398,525
1 4    398,525               2,123                    1,627            496    398,030
1 5    398,030               2,123                    1,625            498    397,532
1 6    397,532               2,123                    1,623            500    397,032
1 7    397,032               2,123                    1,621            502    396,531
1 8    396,531               2,123                    1,619            504    396,027
1 9    396,027               2,123                    1,617            506    395,521
1 10    395,521               2,123                    1,615            508    395,013
1 11    395,013               2,123                    1,613            510    394,503
1 12    394,503               2,123                    1,611            512    393,991
2 13    393,991               2,123                    1,609            514    393,477
2 14    393,477               2,123                    1,607            516    392,961
2 15    392,961               2,123                    1,605            518    392,443
2 16    392,443               2,123                    1,602            520    391,922
2 17    391,922               2,123                    1,600            523    391,400
2 18    391,400               2,123                    1,598            525    390,875
2 19    390,875               2,123                    1,596            527    390,348
2 20    390,348               2,123                    1,594            529    389,819
2 21    389,819               2,123                    1,592            531    389,288
2 22    389,288               2,123                    1,590            533    388,755
2 23    388,755               2,123                    1,587            535    388,219
2 24    388,219               2,123                    1,585            538    387,682
3 25    387,682               2,123                    1,583            540    387,142
3 26    387,142               2,123                    1,581            542    386,600
3 27    386,600               2,123                    1,579            544    386,055
3 28    386,055               2,123                    1,576            547    385,509
3 29    385,509               2,123                    1,574            549    384,960
3 30    384,960               2,123                    1,572            551    384,409
3 31    384,409               2,123                    1,570            553    383,856
3 32    383,856               2,123                    1,567            555    383,300
3 33    383,300               2,123                    1,565            558    382,743
3 34    382,743               2,123                    1,563            560    382,183
3 35    382,183               2,123                    1,561            562    381,620
3 36    381,620               2,123                    1,558            565    381,056
4 37    381,056               2,123                    1,556            567    380,489
4 38    380,489               2,123                    1,554            569    379,919
4 39    379,919               2,123                    1,551            572    379,348
4 40    379,348               2,123                    1,549            574    378,774
4 41    378,774               2,123                    1,547            576    378,198
4 42    378,198               2,123                    1,544            579    377,619
4 43    377,619               2,123                    1,542            581    377,038
4 44    377,038               2,123                    1,540            583    376,455
4 45    376,455               2,123                    1,537            586    375,869
4 46    375,869               2,123                    1,535            588    375,281
4 47    375,281               2,123                    1,532            591    374,691
4 48    374,691               2,123                    1,530            593    374,098
5 49    374,098               2,123                    1,528            595    373,502
5 50    373,502               2,123                    1,525            598    372,904
5 51    372,904               2,123                    1,523            600    372,304
5 52    372,304               2,123                    1,520            603    371,702
5 53    371,702               2,123                    1,518            605    371,096
5 54    371,096               2,123                    1,515            608    370,489
5 55    370,489               2,123                    1,513            610    369,879
5 56    369,879               2,123                    1,510            613    369,266
5 57    369,266               2,123                    1,508            615    368,651
5 58    368,651               2,123                    1,505            618    368,034
5 59    368,034               2,123                    1,503            620    367,413
5 60    367,413               2,123                    1,500            623    366,791
Total          127,374                  94,165      33,209

3. During the first 5 years, how much in total cash has the couple paid towards the mortgage?

The couple has totally paid $127,374 during the first 5 years ($94,165 as interest and $33,209 as principal)

4. What percentage of the cash was applied toward interest?

The couple has paid $94,165 interest out of total payment of $127,374 - thus, they have paid 73.93% ($94,165/$127,374) of cash as interest.

5. What is the balance on their loan as of the end of the 5th year?

Balance on their loan (closing principal) at the end of the 5th year is $366,791

6. Had the couple originally taken a 15-year mortgage rather than a 30-year mortgage, how much higher would their monthly payment be?

Tenure (in years) 15
Payments per year 12
Loan Amount $400,000
Interest rate (per annum) 3.25%
Monthly mortgage payment = PMT(Interest rate/12,Tenure*Payments per year,-Loan Amount) = PMT(3.25%/12,15*12,-$400,000) $2,811
Monthly Mortgage payment on 30 year loan $2,123
Higher monthly mortgage payment $688

7. What would be the balance on their loan be at the end of year 5 if they had opted for the 15-year mortgage?

Balance on thier loan (closing principal) at the end of the 5th year is $287,628

8. What is Jane and Patrick’s monthly mortgage payment after refinancing their mortgage 5-years after they bought the house?

Tenure (in years) 15
Payments per year 12
Loan Amount (Principal outstanding at the end of 5th year as per the Original loan of 30 years) $366,791
Interest rate (per annum) 2.70%
Monthly mortgage payment = PMT(Interest rate/12,Tenure*Payments per year,-Loan Amount) = PMT(2.70%/12,15*12,-$366791) $2,480

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